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JEE Main202522 Jan 2025Morning ShiftPhysicsCurrent ElectricityActual

Sliding contact of a potentiometer is in the middle of the potentiometer wire having resistance R_p=1 as shown in the figure. An external resistance of R_e=2 is connected via the sliding contact. The electric current in the circuit is :

Options

  1. A0.9 A
  2. B1.35 A
  3. C0.3 A
  4. D1.0 A

Correct answer

D. 1.0 A

Step-by-step solution

The circuit can be considered as aligned & R _ eq =0.5+ 0.5 2 2+0.5 = ( 5 10 + 10 25 ) & = 45 50 = 9 10 =0.9 & i = 0.9 0.9 =1 ~A aligned

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